CFY-1152 add policy triggers (no tests yet :/)
CFY-1152 make some fields not required
CFY-1152 add some unit tests
CFY-1152 some more unit tests
CFY-1152 cleanup
CFY-1152 flake8
CFY-1152 flake8
Merge pull request #15 from cloudify-cosmo/CFY-1152-policy-triggers

Cfy 1152 policy triggers